| Patents for Louis W. Gratz |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 681,391 | Aug. 27, 1901 | J.B. Fenner | Muffler for Gas or Other Engines |
 | 705,596 | Jul. 29, 1902 | J.G. Morith | Pipe Wrench |
 | 706,916 | Aug. 12, 1902 | J.B. Fenner | Fuel Valve for Gas Engines |
 | 757,064 | Apr. 12, 1904 | H.J. Smith | Electric Igniter for Gas Engines |
 | 801,927 | Oct. 17, 1905 | H.J. Smith | Fuel Mixing Device for Gas Engines |
 | 805,000 | Nov. 21, 1905 | W.E. Blair | Driving Mechanism for two Pump-Plungers |
 | 818,714 | Apr. 24, 1906 | H.J. Smith | Valve Mechanism for Gas Engines |
 | 829,166 | Aug. 21, 1906 | C.W. Manzel | Lubricator |
 | 832,265 | Oct. 02, 1906 | C.W. Manzel | Lubricating Device |
 | 844,157 | Feb. 12, 1907 | L.R. Loughborough | Drafting Instrument |
